Analysis of the Reasons for the Low Flowering Rate of Late-Maturing Litchi Varieties in Zengcheng in 2024
The abnormal weather in winter of 2023 and spring of 2024 in the Pearl River Delta Region of Guangdong had a great influence on the flowering of late-maturing litchi varieties.Based on the investigation of 13 representative litchi orchards in Zengcheng District,Guangzhou,it was found that the flowering rate of late-maturing litchi varieties in 2024 was extremely low,with the flowering rates of'Guiwei'and'Nuomici'about 10%,and'Xianjinfeng'about 25%,which could be characterized as an"extra-low-yield year"caused by natural disasters that had not occurred in 21 years.The main reasons for the low flower-forming rate of late-maturing varieties were analyzed.Firstly,the warm winter weather made it difficult to complete the physiological differentiation of flower buds,which was mainly manifested by the changes such as too high temperature,late arrival of low temperature but with short duration,rapid and high temperature recovery(>25℃),long interval between two cold waves and rapid alternation of cold and warm,which disrupted the normal rhythm of physiological differentiation of tree flower buds.Secondly,the superposition of cold wave and cold spell in later spring led to the obstruction of flower bud morphological differentiation,especially the two cold spells in later spring after the beginning of spring seriously inhibited the process of flower bud morphological differentiation.Thirdly,the warm and humid southeast winds after the beginning of spring made the obvious flower buds turn into leaf buds in the process of germination.The results of the investigation and analysis in this paper would have a certain guiding significance for explaining the causes of the"extra-low-yield"year of late-maturing litchi in China in 2024 and developing the flowering strategies of litchi to cope with abnormal weather in the future.
litchiabnormal weatherflower bud differentiationinvestigation and analysis
万方数据
维普
